I wrote real person slash once (or twice I guess). Both were written at the table at Perkins late one night. Both were for guy friends who were also at the table. They were very, very brief: one was a limerick, one was a pseudo-haiku (the type that really only just has the syllable count, but otherwise isn't a haiku). The four fellas involved were amused. (And finding a rhyme for "Madison" in a limerick is not easy, let me tell you.)
This same late night convo on real person slash led to the concept of RP slash involving former presidents, and furry RP slash, which led to someone posting Wombat Lincoln which led to this.
Yeah, it was one of those nights.